-immediate_rendering 0/1 = use immediate mode rendering to draw the data (default: disabled)
Note: the use of immediate rendering will enable the visualization of larger datasets at the expense of extra RAM.
See http://en.wikipedia.org/wiki/Immediate_mode for more information.
-vbo_rendering 0/1 = use OpenGL 1.4+ Vertex Buffer Objects for rendering (default: disabled)
Note: the use of VBOs will enable the visualization of larger datasets at the expense of extra RAM.
See http://en.wikipedia.org/wiki/Vertex_Buffer_Object for more information.

-use_point_picking = enable the usage of picking points on screen (default disabled)
(Note: for multiple .pcd files, provide multiple -{fc,ps,opaque} parameters; they will be automatically assigned to the right file)